Get gold scales and exchange them for unique items.
Salmon Run Dares and Rewards Explained! – Splatoon 3 Salmon Run
Splatoon 3 has recently launched, and there are tons of new things added. You can either play by yourself or play with friends.
The campaign for Splatoon 3 has been drastically improved, and it's only getting better. The Salmon Run is also back in the game, and you can get goldfish scales after completing the run.
Goldfish wave can be used to get unique banner designs, clothing, stickers and statues. Farming for them can be quite time consuming and boring, so you have to grind for the scale. You can get them by competing in the "Salmon Run" mode.